serial: sirf: don't submit dma desc after timeout irqs occur
serial: sirf: don't submit dma desc after timeout irqs occur

In rx timeout ISR and tasklet, we don't issue new dma desc as rx_done ISR
will do that.

Signed-off-by: Qipan Li <7edc63b2168f7aeebdbedbd3916b18244ee96ac4@csr.com>
Signed-off-by: Barry Song <a856445693a373abed3e477bd705f7011cbd8a1d@csr.com>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs